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ERIC Number: EJ934634
Record Type: Journal
Publication Date: 2011-Aug
Pages: 12
Abstractor: As Provided
Reference Count: 57
ISBN: N/A
ISSN: ISSN-0096-1523
Spatial Biases in Peripersonal Space in Sighted and Blind Individuals Revealed by a Haptic Line Bisection Paradigm
Cattaneo, Zaira; Fantino, Micaela; Tinti, Carla; Pascual-Leone, Alvaro; Silvanto, Juha; Vecchi, Tomaso
Journal of Experimental Psychology: Human Perception and Performance, v37 n4 p1110-1121 Aug 2011
Our representation of peripersonal space does not always accurately reflect the physical world. An example of this is "pseudoneglect", a phenomenon in which neurologically normal individuals bisect to the left of the veridical midpoint, reflecting an overrepresentation of the left portion of space compared with the right one. Consistent biases have also been observed in the vertical and radial planes. It is an open question whether these biases depend on normal visual experience for their occurrence. Here we systematically investigated this issue by testing blindfolded sighted and early blind individuals in a haptic line bisection task. Critically, we found a robust leftward bias in all participants. In the vertical and radial planes, sighted participants showed a consistent downward and proximal bias. Conversely, the directional bias in blind participants was dependent on the final movement direction; thus, there was no general bias in either direction. These findings are discussed in terms of different reference frames adopted by sighted and blind participants when encoding space. (Contains 2 footnotes, 3 tables, and 4 figures.)
American Psychological Association. Journals Department, 750 First Street NE, Washington, DC 20002-4242. Tel: 800-374-2721; Tel: 202-336-5510; Fax: 202-336-5502; e-mail: order@apa.org; Web site: http://www.apa.org/publications
Publication Type: Journal Articles; Reports - Research
Education Level: Adult Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A